Ever since the mutter image started to set up a non-root user for
running tests, the toolbox image built on top of it has been broken.
The issue has now been addressed, so update the image to pull in
the fix.
Part-of: <https://gitlab.gnome.org/GNOME/gnome-shell/-/merge_requests/2850>
- 'api_failure'
variables:
- MUTTER_CI_IMAGE: registry.gitlab.gnome.org/gnome/mutter/fedora/38:x86_64-2023-06-27.0-libei
+ MUTTER_CI_IMAGE: registry.gitlab.gnome.org/gnome/mutter/fedora/38:x86_64-2023-07-22.0
FDO_UPSTREAM_REPO: GNOME/gnome-shell
BUNDLE: "extensions-git.flatpak"
LINT_LOG: "eslint-report.xml"